Not much is known, or at least widely reported, about the Demonic Realm. The leading theory is that when Avasyu, the Creator, formed the Physical Realm, he discarded anything He found impure and imperfect, leaving it in a realm that became the demonic realm. It is from the relationship between the three realms - physical, spiritual, and demonic - that the theory of the Tisnaag, or doppleganger, is formed.